The effect of alefacept on T-cell subsets and cells expressing NK receptors in lesional psoriatic skin: The effects of monotherapy and combination treatment with calcipotriol. - Vissers, W. H. P. M.; van Duijnhoven, M.; van Erp, P. E. J.; de Jong, E. M. G. J.; van de Kerkhof, P. C. M. (Journal of Dermatological Treatment, 2008)